I got a Wayfarer trailer from Admiral trailers Tiverton Devon also after having to repair the bilge keels…….I have big wheels fitted and have trailed to South of France with boat full of camping gear twice……..it trails beautifully and on French roads happily up to 70 mph +…….got the ticket to prove it. Cost of trailer in the region of ?500 two years ago, cost of the ticket….priceless, particularly when daughter decides to fire digital camera flash in the car at night to generate paranoia (simulating speed camera).
The bench seat will be a lot more tricky to get hold of…….back copies of the Wayfarer magazine and look at the for sale section, and knock up something home made in the meantime…good luck or buy new from Porters………